зеркало из https://github.com/mozilla/gecko-dev.git
104 строки
2.8 KiB
C++
104 строки
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "nsSelectsAreaFrame.h"
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#include "nsCOMPtr.h"
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#include "nsIDOMHTMLOptionElement.h"
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#include "nsIContent.h"
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#include "nsIAreaFrame.h"
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static NS_DEFINE_IID(kAreaFrameIID, NS_IAREAFRAME_IID);
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nsresult
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NS_NewSelectsAreaFrame(nsIFrame** aNewFrame, PRUint32 aFlags)
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{
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NS_PRECONDITION(aNewFrame, "null OUT ptr");
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if (nsnull == aNewFrame) {
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return NS_ERROR_NULL_POINTER;
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}
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nsSelectsAreaFrame* it = new nsSelectsAreaFrame;
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if (nsnull == it) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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it->SetFlags(aFlags);
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*aNewFrame = it;
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return NS_OK;
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}
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/*NS_IMETHODIMP
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nsSelectsAreaFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
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{
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if (NULL == aInstancePtr) {
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return NS_ERROR_NULL_POINTER;
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}
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if (aIID.Equals(kAreaFrameIID)) {
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nsIAreaFrame* tmp = (nsIAreaFrame*)this;
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*aInstancePtr = (void*)tmp;
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return NS_OK;
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}
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return nsAreaFrame::QueryInterface(aIID, aInstancePtr);
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}
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*/
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//---------------------------------------------------------
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PRBool
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nsSelectsAreaFrame::IsOptionElement(nsIContent* aContent)
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{
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PRBool result = PR_FALSE;
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nsCOMPtr<nsIDOMHTMLOptionElement> optElem;
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if (NS_SUCCEEDED(aContent->QueryInterface(nsCOMTypeInfo<nsIDOMHTMLOptionElement>::GetIID(),(void**) getter_AddRefs(optElem)))) {
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if (optElem != nsnull) {
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result = PR_TRUE;
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}
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}
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return result;
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}
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//---------------------------------------------------------
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PRBool
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nsSelectsAreaFrame::IsOptionElementFrame(nsIFrame *aFrame)
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{
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nsIContent *content = nsnull;
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aFrame->GetContent(&content);
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PRBool result = PR_FALSE;
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if (nsnull != content) {
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result = IsOptionElement(content);
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NS_RELEASE(content);
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}
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return(result);
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}
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//---------------------------------------------------------
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NS_IMETHODIMP
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nsSelectsAreaFrame::GetFrameForPoint(const nsPoint& aPoint, nsIFrame** aFrame)
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{
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nsAreaFrame::GetFrameForPoint(aPoint, aFrame);
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nsIFrame* selectedFrame = *aFrame;
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while ((nsnull != selectedFrame) && (PR_FALSE == IsOptionElementFrame(selectedFrame))) {
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selectedFrame->GetParent(&selectedFrame);
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}
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if (nsnull != selectedFrame) {
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*aFrame = selectedFrame;
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}
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return NS_OK;
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}
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